[Bobcat]

Priobe .... about the engine sounding diffident now .... not crazy at all . Now that you have the valve train geometry correct , the whole thing has less strain on it . Had the same thing happen on my 427 Galaxie where the guy who did my heads screwed them up on the valve stem lengths . After the correction ( shimmed the stands ) , the engine was a more "even" sound and not as "clattery " .
When the center line of the rocker coincides with the center line of the valve stem at 50% lift ... good things happen .

Bob